Effect of Sodium Pyrophosphate on the Reverse Flotation of Dolomite from Apatite

被引：43
|
作者：
Chen, Yanfei [1 ]
Feng, Qiming [1 ]
Zhang, Guofan [1 ]
Liu, Dezhi [1 ]
Liu, Runzhe [1 ]
机构：
[1] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
来源：
MINERALS | 2018年 / 8卷 / 07期
关键词：
sodium pyrophosphate; flotation; depression; apatite; dolomite; PHOSPHATE ORES; COLLOPHANITE ORE; COLLECTOR; ACID; PERFORMANCE; DEPRESSANT; CARBONATES; SCHEELITE; MECHANISM; MINERALS;
D O I：
10.3390/min8070278
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
In this study, the effect of sodium pyrophosphate (NaPP) on the separation of apatite from dolomite by flotation was systematically investigated. Flotation results revealed that NaPP could selectively depress the flotation of apatite, thus realizing the separation of apatite from dolomite. Further, the selective depression mechanism of NaPP was studied through zeta potential measurements, contact anglemeasurements, and X-ray photoelectron spectroscopy (XPS) analysis. The results demonstrated that the adsorption of sodiumoleate (NaOL) onto apatite surface was depressed by the preferential interaction of NaPP with active Ca sites. For dolomite, while the presence of NaPP hindered the interaction of NaOL with active Ca sites, it appeared to enhance the reactivity with active Mg sites. Thus, the adsorption of NaOL onto dolomite surface was hardly influenced. In this way, the separation of apatite from dolomite was achieved.
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页数：11
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